Elevator lock



Feb. 27, 1923 F. G. SHEPHERD ELEVATOR LOCK Filed Jan. 29, 1921 2sheets-sheet l Feb. 27, 1923. 1,446,668

F.G.SHEPHERD ELEVATOR LOCK Filed Jan. 29, 1921 2 sheets-sheet 2IUVE'IITEH Am] f ngy Application awn- 2 om it 1. 2113] cancer-2'1,

; snoivn that l, l: nANn w. orrnrnnirn, States, residing at count; of '0alt invented 5 new and i Ele ator Lo ks of ecilication.

'- vention herein dohe A cd is to prov lock; is the cont f a 1d thu,ants t re one? .vuion or the car hile any shaft is not snut and locltodfhas advantages over t pes' that it is located on the door where theordinary lock is at the top thus preventing; unbalanced and possibly'ollers by the operation of unlocked, the circuit roor o -Jones b oneroll on time in opening and i ie type which is placed the tor, re doorand requires two moveincnts to uni-och and open the door; the wirconnetns to the oi cuit breaking switch t locl; are iuch sir I expensive '1"ran to a door; t lo i and lilrel I pler and less ph at the to oi; itselfis much sun- 7 to 91c out or" order than U o L 36 M @ther advant new onthe market will appear hereafter. the accompanying drawings 1 is a ofthe lock mechanism d unlocking mounted on a door and the Weight 1 J! lii nl or Fig. 2.

' a to; v'eW of switch (:01 tacts lett elevation of dog 28 andperspective of the mechanism n the lock when a push button the floor atwhich it is desired r trates an alternative method 'i the lock releasemechanism to return to normal osition.

filed January 29,

Plate is si'iounted on the door and carries stud G i The bell-cranklever 8 G and to arin thereof Jar I) which runs through guide liar f) las on its sires projections 10, 1'1, LL, and 13 which ser 'e to restrictits travel and on its outer end ias handle used "for operating both doorand lock. The end of ever 8 adjacent ho: l is curved on top so that itwill act against and raise weight when the door is closed This end alsocarries on its lower side an insulating' to which is bloclr 15 secured tmetal plate 16. On A 0t said bell crank lever 8 is l? which engages theframe or said box l thus locking the is however, sufficient clearlowerside of lever 8 at notch and the lJOfI trance p rinit plate in contactwith contacts :5 The weight of t 2 are carried enilil'cilllktfjtf and l,thus good vl eigg'ht element 2 is tree to more vertically, being o uidedloosely h bolt ill and the sides of bot-t. s travel do. ward isrestricted hv head 19 0'? bolt 18. Fig 2, which fits in recess 20 ot'the weight element. This recess opens at the rear ot the weight elementis cast therein. The position to which it element inay tall is adjustedby in surini 3 varying the position ot nut 21.

To open the door, the operator pulls the and tl'iereo v moves the oar 9loni v which inoverient'sh said bellcrank lever 8 on its pi ot andraises the aid lever and the weight 9,

s notch 17 from the box switch bv breaking the concts 3 and 4. The thusooenin th switch is shown one cl? the inanv in elevators. li'ii e*ontroller 23. ire i252 disconnectnt brol i actuati l ell'ect oit' (3which illust coiinections encounter the teed wire to the ll'l'iein forany reason. v;

cd from the controller 0' l elevato will not oper s r 7 current is cutoil". r hr r in this wire therefore inmle between L switch andcontroller the i carricd h a suspended cable I i l i as J as there arelloors Fig. 5, and all are wired in series. Therefore it any door heopened or unlocked the circuit through the controller will be broken andthe elevator will l ail to operate until the door is closed and locked.Fig. 5 also shows the method of running conduit 26 which carries wire 22between the switches. This conduit is run vertically from one switch tothe neKt and the cable connection to the car is made from the junctionmidway up the elevator shaft. In the of loclrswhich are fastened to thetop of the door and "frame it is necessary to install two condulets orbends at each floor, thus practically doubling: the cost of wiring, andin addition this conduit running; across the front of the shaft at eachfloor, together with the lock box. adds an element 07f danger because ofthe possibility of its becoming; loosened and caught by the moving caror hitting a passanger who stands too near the front. his element oitdanger and the extra 'wiring'exp'ense are eliminated by the deviceherein described.

Fig. 7 shows'an adaptation of the device to a push button elevator. Theobject oi this adaptation is to prevent the opening of any door to theshaft except the one at which the car rests. I This is accomplished bythe use oi. weight 27, n8, iever 29, shatt 30. roller 31, and hellcranli A detail of weight 27 and lever 29 as placed therein is shown inFig. 8. 9 shows the elation of dog); Q8 and lever 29 as they arefastened to shaft 30 The operation of the device is hest illustrated byFig. 10. its the car comes to any floor a projection 33 fastened to thecar eou'ies in contact with roller 31 and forces it upward and back,thus rotating bell crank 32 and shaft in turn rotates 28 causing it tobecome disengaged from notch in lever B. and at the same time causeslever 29 to raise weight 27. Shaft 30 moves in slot as WGlQfllt 27 israised. soon as 28 is disengaged from notch E l lever 8 may be operatedfrom either the out-- side or insideof the shaft. but when the car isnot in position so that projection 33 en roller 31 weight 27 acting onlever causes dog? 28 to return to engagement with notch 34, thus preveiiting the operation oi lever 8;

What I claim my invention is:

1,. An elevator lock comprising: a bellcrank lever pivoted on the doorol an elevator; a handle connected with one arm of said hell-crank leverto move said lever on its Divot. another arm of said lever having anotch in its underside and a weighted no tion opposite said notch; acurrent carrying ineinber fastened on and insulatec from said lastmentioned arm of said lever; and contact ineiuhers spaced apart andmounted adjacent said lever and on which said cont-act i ber rests whensaid lever is in normal position. I

2. Lin elevator lock comprising a box; a bell-crank lever pivotedtherein with one arm protruding from said box and having a notch cut inone edge thereof; a handle connected with the other arm of saidbell-crank lever by which the lever isinoved on its pivot; spaced apartcontact ineinbers mounted. in said box which is secured to the elevatordoor frame; a contact nieinher mount ed on and insulated from thenotched arm of said lover a": l hjtZlD'ilGd to hrid the space oetweenthe contact members in said box; and a weight in said. box adapted toresist the movement of l lever in one direction and to aid saidn'ioveaient in the opposite direction.-

3. in elevator loch comprising; a box having an opening; in one edgethereof; current carrying coi "acts in said hox forming a nortion of anelectric switch; a weight noounted for imit l vertical movement in saidboir; a" .nual 1 operated hell-crank lever pivoted on a iriovahle door dhaving one arm notched to said in w thin said openiiio' therein; a metalmember on the same of said lever to complete the electric circuit whenit is l l. in elevzitor loch comprising a hex secured on the frame of adoor and having); a portion o't one side out out; spaced apartswitchcontacts secured within said box: a plate astened on the door of anelevator adthe said box on the frame of the viii as Y'Vitnesses V l3.DUNBAR" Ann C. Tunrson. Y

orought in touch with both or said current carri -no contacts.

a bell-crank lever pivoted on said

